Concrete-mold.



' W. T. HARRIS, Sn.

CONCRETE MOLD.

APPLICATION rmm we. 12. 1909 Patented June 7, 1910.

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W. T. HARRIS, Sn.

. CONCRETE MOLD.

APPLICATION 11.21) AUG.12. 1909.

' Patented June 7, 1910.

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WILLIAM T. HARRIS, S3,, OF I-IARRODSBURG, KENTUCKY.

CONCRETE-MOLD.

To all whom it may concern:

Be it known that I, VViLLIAM T. HARRIS, $12, a citizen ot the UnitedStates, residing at Harrodsburg, in the county of Mercer and State ofKentucky, have invented a new and useful Concrete-Mold, of which thefollowing is a specification.

This invention relates to improvements in molds for forming concreteblocks, posts, piles or other articles and consists in certain novelfeatures of the device illustrated in the accompanying drawings, as willbe hereinafter first fully described and then particularly pointed outin the appended claims.

In the said drawings, Figure 1 is a vertical longitudinal section of amold constructed in accordance with my present invention. Fig. 2 is ahorizontal section of the same, showing the sides of the mold swungoutward to permit the removal of the block in dotted lines. Fig. 3 is adetail perspective View of the hopper. Fig. 4 is a detail verticalsection of the core block, and Fig. 5 is a detail perspective view ofthe latch by which the sides of the mold are locked in position to forma block.

In carrying out my invention I employ a pallet 1 upon which the mold isadapted to and which is provided at about its center with a slot 2 tofacilitate the fastening of the core in operative position. The sides ofthe mold 3 may be constructed of wood or metal of other suiticientlystrong material and upon the outer faces of the said sides I rigidlysecure angle irons 4, the ends of which overlap at the corners of themold and are provided with registering openings through which suitablefastening bolts are inserted to hingedly. secure the sides 3 together.It will be understood that the several sides 3 may be of any desiredsize and relative proportions determined by the nature of the article tobe formed in the mold. One end wall. 3 has its angle irons 4: providedwith notches 6 in their upper edges just beyond the adjacent side walland upon the said side wall I pivot latches or'locking levers 7 whichare provided with notches 8 in their edges adapted to fit over thebottoms of the notches 6 so that the said levers and angle irons withtheir respective notches will form an interlocking engagement tosecurely hold the sides of the mold in their proper position when themold is in use. In order to further hold the sides of the Specificationof Letters Patent.

Application filed August 12, 1909.

I i i i i Patented June 7, 1910. Serial No. 512,557.

mold in their proper operative position and to prevent loss of thematerial while the same is being fed into the mold, I employ a hopper 9which consists of an open frame having an upper fiared portion 10, thesides and ends of the said frame being rigidly secured together by meansof corner plates 11 riveted to the meeting ends of the sides of thehopper, as clearly shown in Fig. 3. When the hopper is placed inposition upon the mold it will fit snugly against the outer faces of thesides and ends of the mold and its lower edges will rest upon the upperangle iron 1, as clearly shown in Fig. 1.

With the parts thus far described, a solid block may be readily formedby simply pouring the plastic material into the mold and tamping thesame, first, of course, inserting a suitable plug within the slot 2 ofthe pallet, as will be readily understood. After the material has beenproperly tamped, the mold is removed from around the block, leaving thesame on the pallet to dry. In order to form a hollow block I employ acore 1.2 which may be of any suitable material and may be given anydesired form so that the opening provided in the block will have thedesired shape. The core is provided with a locking pin 13 which ismounted in the top of the core and extends downward below the same so asto project through the slot- 2 in the pallet. The lower end of thislocking pin is provided with a head 14 of such a size and shape that itwill readily pass through the slot 2 when the pin is turned so as tobring the head into alinement with the said slot and will projectacrossthe slot and engage the under side of the pallet when the pin is turnedto the position shown in Fig. 1 and in dotted lines in Fig. 2 so thatthe core will then be firmly held in position in the mold. This lockingpin 13 is provided with lateral arms 15 above and below the top of thecore so that when the pin is locked in engagement with the pallet theupper arms 15 will bear upon the top of the core and thereby hold thesame firmly against the pallet, while, when the locking pin has beenturned so as to bring the head 14 into alinement with the slot 2, thelower arms 15 may be brought against the top of the core so as to liftthe same from its position within the mold. In order to remove the corefrom the molded block without breaking the block, a screw 16 is mountedin the top of the core and adapted to bear against the upper side of thepallet, as clearly shown in Fig. 1. By rotating the said screw, the corewill be caused to move upward from the pallet so that it will not benecessary to knock or ar the core in order to release it from theconcrete and, consequently, cracking or breaking of the block will beavoided. Cracking of the molded block may be further avoided by the useof the cover or plate 1.7 which is provided with a handle 18 at each endand is adapted to rest on the molded block around the core so that asmooth surface will be given the upper side of the molded block and byexerting a slight pressure upon the said cover through the handles 18the set of the concrete will be maintained when the core is movedtherefrom.

In using my improved mold the mold is set up with the core therein andthe concrete is then poured into the mold around the core in the usualmanner. After the material has su'll'iciently set, the screw 16 isrotated so as to press against the pallet and thereby start the coreupward so as to loosen the same from the molded block, it beingunderstood that the locking pin 13 is first turned so as to bring thehead 14L into alinement with the slot in the pallet so that when thecore is loosened from the block and starts to move upward, the lockingpin will not check such movement. After the core has been loosened fromthe block, the locking pin can be raised so as to quickly lift the corefrom its working position.

The device is extremely simple in its construction and its advantagesare thought to be obvious.

Any concrete article, from a small brick to a large pile, may be made ina mold constructed in accordance with my invention, the proportions ofwhich may be varied at will to correspond to the article to be formed.

Having thus described my invention, what I claim is l. The combinationof a pallet having a slot, a mold resting on the pallet, a core withinthe mold covering the slot in the pallet, and a locking pin mounted inthe top of the core and provided at its lower end wit-h a head adaptedto pass through the slot in the pallet and engage the under side of thepallet, the locking pin being provided with laterally extending armsabove and below the top of the core, and a screw mounted in the top ofthe core and having its lower end bearing upon the pallet.

2. A mold for concrete blocks comprising a plurality of walls, angleirons arranged longitudinally upon and secured to all but one of saidwalls and having the upstanding portions thereof cut away at their ends,the end portions of said angle irons lapping and being pivotallyconnected, an angle iron secured longitudinally upon the remaining walland having its upstanding portion cut away at one end and lapping andpivotally connected to the cut away portion of one of the firstmentioned angle irons, there being a notch within the upstanding portionof said angle iron adjacent its other end, the upstanding portions ofsaid angle irons constitnting means for limiting the swinging movementof the walls toward each other, and a latch pivotally mounted on one ofthe walls and movable into engagement with the notched angle iron tosecure all of said irons in a predetermined relation.

In testimony that I claim the foregoing as my own, I have hereto atlixedmy signature in the presence of two witnesses.

VILLIAM T. HARRIS, SR.

\Vitnesses JNo. BREWER, C. D. THAYER.

